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PG32UCDM Color Accuracy Issue (Pre-Calibration)

Robot_M
Level 9

The screen's built-in color calibration test report shows that the screen's color accuracy in sRGB Cal mode is about 0.5 DeltaE at its highest.

I used i1Pro2 + i1Display Pro 3 for testing, the following are the test results of white point
CMF: 1931_2deg
Target: D65(0.3127, 0.3290)
          ---> 0.3112, 0.3177 dE2000: 7.5
Target: Judd offset(0.3067, 0.3180)
          ---> 0.3118, 0.3179 dE2000: 3.7

CMF: CIE170_2deg
Target: D65(0.3135, 0.3308)
          ---> 0.3165, 0.3273 dE2000: 4.6

A recent review by rtings also pointed out that White Balance dE (Avg.) 6.02 was significantly different from the built-in color correction test report.
In addition, the gamma of this screen is also low, about 2.1.

Reviews of tftcentral and techspot a few months ago did not seem to have this problem.

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8 REPLIES 8

Robot_M
Level 9

RTINGS's color accuracy (pre-calibrated) test

Score components:
sRGB Gamut Area xy: 9.7
White Balance dE (Avg.) 5.1
Color dE (Avg.) 7.1

This is not a good factory calibration result.

The results measured by my monitor and RTINGS are similar.
The firmware version during the test was MCM103, and the cables used were HDMI and DP.
The monitor production date is the 13th week of 2024.


By the way,

In RTINGS HDR Color Gamut test results, the white point calibration in HDR mode is also not as expected, with the white point dE2000 exceeding 3.0.
In the tftcentral review, the white point was as low as dE2000: 1.9.

I will update with the results of my own testing in a few days.

Robot_M
Level 9

In rtings' review, the white point deltaE in the Color Accuracy (Pre-Calibration) test item is about 9.0.

The following are the results of my measurements today.
Color accuracy in HDR mode is not bad, garyscale tracking deltaE is less than 3.0.
PG32UCDM_HDRPG32UCDM_HDR

But the color accuracy in sRGB Cal mode is very poor, and the deltaE of the white point even reaches 7.98.

PG32UCDM_sRGB CalPG32UCDM_sRGB Cal

Aureliannn_ROG
Customer Service Agent

Hi @Robot_M ,

thank you for your question. 

We recommend that you first use our pattern then warm-up before taking measurements. 

During this time, we will also submit your test results to the relevant team for confirmation.

Thank you.

Providing detailed device specifications (MB/CPU/GPU/PSU, etc.) and the respective driver versions, OS version, and BIOS version will help us analyze the issue more effectively.

Aureliannn_ROG
Customer Service Agent

Hi @Robot_M ,

could you kindly provide the product serial number via private messege to me?

Thank you.

Providing detailed device specifications (MB/CPU/GPU/PSU, etc.) and the respective driver versions, OS version, and BIOS version will help us analyze the issue more effectively.

Robot_M
Level 9

Hi @Aureliannn_ROG ,

Thank you for your quick reply.
I have sent you the product serial number.

thanks

Robot_M
Level 9

I saw the calibration report for the PG32UCDM using Konica Minolta CA-410.
When you calibrated the PG32UCDM before, did you use the original probe, or the CA-P427C or CA-P410C probe?
I would like to know if this product is calibrated using CIE 1931 CMF or CIE170-2:2015 CMF.
It would be nice if the white point coordinates for the PG32UCDM calibration could be provided so I could take more measurements.

https://www.konicaminolta.eu/eu-en/hardware/measuring-instruments/light-and-display-measurement/disp...

Aureliannn_ROG
Customer Service Agent

Hi @Robot_M ,

we have sent you a messege via PM box, kindly check the messege and confirm.

Thank you.

Providing detailed device specifications (MB/CPU/GPU/PSU, etc.) and the respective driver versions, OS version, and BIOS version will help us analyze the issue more effectively.

Robot_M
Level 9

Hi @Aureliannn_ROG ,

Thank you very much for the information you provided. However, this information does not explain why there is such a significant deviation in the white point.


I am aware that the accuracy of the X-rite i1 Pro2 paired with the X-rite i1 Display Pro 3 is not as high as that of the CA-410 paired with the CS-2000.
Therefore, a white point deviation below 3 deltaE falls within the normal margin of error.
However, in my actual measurements, the white point deviation exceeds 6 deltaE.

If this issue were unique to my PG32UCDM, it might be due to incorrect measurement methods or a faulty instrument.
However, I have found multiple reviews indicating that the PG32UCDM has noticeable white point/gray scale deviations, and the problem is concentrated in SDR mode, not HDR.
I don’t understand why the white point of PG32UCDM is so different between SDR mode and HDR mode.

Factory calibration reports do not match measurement.

RTINGS
SDR: White Balance dE (Avg.) 6.02
HDR: White Point dE 3.5
https://www.rtings.com/monitor/reviews/asus/rog-swift-oled-pg32ucdm
RTING_PG32UCDM_SDRRTING_PG32UCDM_SDRRTING_PG32UCDM_HDRRTING_PG32UCDM_HDR

digitec.ch
SDR: Greyscale dE (Avg.) 4.1 (Max.) 6.2
HDR: Greyscale dE (Avg.) 0.9 (Max.) 1.9
https://www.digitec.ch/en/page/asus-rog-swift-pg32ucdm-review-costly-king-32969
digitec_PG32UCDM_SDRdigitec_PG32UCDM_SDRdigitec_PG32UCDM_HDRdigitec_PG32UCDM_HDR

My own test results
SDR: White Point dE (Max.) 7.14
HDR: White Point dE less than 3.0
PG32UCDM_SDRPG32UCDM_SDR